/// 妙手
bool isBestChess(bool isBlack, double wsl, int stage, int order) {
  if (order > 0) {
    if (isBlack) {
      return (wsl > 0.5 && stage < 2) || (wsl > 2 && stage >= 2);
    } else {
      return (wsl < -0.5 && stage < 2) || (wsl < -2 && stage >= 2);
    }
  }
  return false;
}
